Electric power transmitter



Nov. 24, 1925- P. A. HERR ELECTRIG POWER TRANsMITTER Filed Sept, 18. 1924 2 Sheets-Sheet l INV NTOR BY y ZTTORNZELLS w Essgs ,S

Nov. Z4, 1925 P. A. HERR ELECTRIC PowER TRANSMITTER Filed Sept. 18, 1924 2 Sheets-Sheet 2 iai, lli

BM y

ATTORNYAQLW lPatented Nov,

al, 192s..

PARK A. HERR, F HILLSTDE, NEW JERSEY, SSIGNOR TO THE SINGERDANUIEAG Parent orrica TURN@ CUWILPANY, OF LTZABETH, NEW JERSEY, .d CORPORTION OF NEW will?,

ELECTRIC PWER TRANSMITTER.

Y .application filed September 118, 19%. Serial No. 238,331.

To all whom t may concern.: t

Be it known that l, Penn il. linnn, a citizen or the United States, residing at ltlillk side, in the county oi lUnionA- and State of New Jersey, have invented certain new and usetul lmprovements in Electric Power lli Transmitters, of which the following is a specilication, reterence being had therein to the accompanying drawings. y

'lhis invention relates to electric powertransmitters oit the type adapted more particularly 'for driving sewine machines and has Vor an object to provide lan improved transmitter unit of minimum length and maximum pick-np i. e., rate ot accelera- Y )tion in starting the driven machine.

A :turther object oit the invention is to provide an electric transmitter the rotary clutch-elements ot which are effectively guarded at all times. f

The objects 'ot the invention are attained by mounting the driving and driven clutchelements within the motor-frame, land by so arranging the parts that the motor-shaft bearing heretofore customarily provided between the motor-elements and the driving clutch-element may be eliminated; the lat-` ter element being, in the present instance, carried by a rotary and endwise movablesleeve-shaft in which one end of the motorshaztt is journaled.

ln the accompanylng'drawings, Fig. is

i a side elevation, partly in section, oit' an if rig. a

electric transmitter unit embodying'the invention. llig.' 2A is'an 4end elevation of the same and Fig. 3 is a section onthe line 3, 3

y 1n the Ipreferred embodiment ofthe ine-4 vvention, as illustrated, ll represents vtheholu dll low cylindrical motor-frame including the kusual attaching :teet 2. -Disposed within the motor-frame are the magneticallycoacting stationary and rotary motor-elements, 3

. and Ll, respectively. These latter elements are shown as the usual stator .and rotor ele-1 "pfments of a squirrel-.cage induction motor,

but the particular type of motor elements 'is immaterial to the present improvement. 'lhe rotary motor-element 3 is fixed to the, motor-shaft 5 to which is also Xed within the motor-frame the weighted fly-wheel 6 having the conical clutch face 7.'

The motor-frame has at its opposite ends the bearing supports, 8, 9 in the former of which is placed a bearing 10 'for one end of p l 4 the motor-shaft 5,. rlllie bearing support 9 which is carried by the removable end-bonnet element 9 of the motor-'francais ntted with the bearing bushing 1,1 in which is .journaled the rotary and endwise movable sleeve-shaft 12, the inner end ot whichcarries and 1s preferably formed integral with ythe driven clutch-member 13 provided with eci a friction ring lll, say otleather, mating with the face 7 ot the driving clutch-element. rlhe driven clutch-element 13 is also preterably formed with a braking surface 15 'i adapted to engage the stationary braltepulley. within the end ot the hub 210i which is tightly tted the button 22 have' inge shank entering the sleeve-shaitt12.

A coil-spring 23 is interposed between the button 22 and the motor-shaftA 5 and urges the driven clutch-member 13 toward brake shoe 16, at the same time urging the' motorshaft 5 in the opposite direction and against thethrust-bearing 24 provided at the opposite end of the motor-shaft adjacent the' bearing support 8.

Manual control ofthe clutch mechanism y.

is adorded by a leverl formed with three arms 25, 26,- 27 and ulcrumed at 28 onzthe removable end-bonnet element 9" ot the motor-framed. ylhe arm 25 is arranged to bear upon the button 22 and force ythe sleeveshaft and 3 driven clutch-element 13 into working engagement with theV drivin ,clutch-element'6.` 'lhe arm 26 has rivete thereto, a brleather shoe ,29' arranged to assist lthe spring 23 inshitting the drivenA ele-4 ments 13, 12, 2O in the opposite direction. The arm 27 is connected to a-treadle by the usual. stili' rod (not shown), whereby both ldownward and upward impulses may be im-' parted 'to said arm.

Lubricatlon of the bearings between the motor-shaft, sleeve-shaft 12 and bushing 11 may be effectedy by providing' suitable grease cups 30 and lubricant channels 31.

i i By .virtue of Elacng the rotary motorelement 3, ily-w eel 6 and driven clutchelement 13 in close juxtaposition within the -motor-frame and between the bearings for vthe motor-shaft, great com pactness is secured while retaining maximum acceleration afforded by a heavy ily-wheel. There are but two bearings for the motor-shaft and these bearings are at the opposite ends of the-motor-frame. Access to the clutchelements is readily had by removal of -the end-bonnet 9 and without the necessityv of disassembling the driven elements 13, and clutch-co'ntrollinv lever v25, 26, 27. The clutch-elements, ieing disposed Within the cylindrical motor-frame, are effectively guarded at all times.

. one of said bearinigs,

Having thus set forth the nature of the invention, what I claim herein is- 1. An electric power-transmitter compris-v ing a frame having bearings at its opposite ends only, a rota and endwise movable sleeve-shaft journa ed in one of said bearings, a driven clutch-element carried by said sleeve-shaft at its inner end between said bearings and formed with a friction clutch-face, a belt-pulley fixed to the outer end of said sleeve-shaft, a motor-shaft jour'- naled at its opposite ends only in said sleeve-g shaft and the other of the motor-frame bearings, a driving clutch-element fixed 'to the motor-shaft between the bearings for such shaft and formed with a friction clutch-face mating with that of the driven clutch-element, magnetically coacting stationary and rotary motor elements, said rotary element beinglixed to the motor-shaft adjacent said' ily-wheel, manually operated means for sliding said sleeve-shaft endwise, and a thrustv bearing associated with the .motor-shaft bearing'remote from V said sleeve-shaft. A

2. An electric wer-transmitter comprising a hollow cylindrical frame having b earings at its opposite ends onl a rotary and journaled in' endwise movable sleevesha a driven clutch -element carried by said s eeve-shaft within the motor-frame and formed with a friction clutch face, a belt-pulley -fixed toA said sleeve-shaft externally 'of t motor-frame, a motorshaft journaled at its opposite ends only in said sleeve-shaft and the other of the motorframe bearings, a fly-wheel fixed to sthe motor-shaft within the motor-frame and formed with a clutch-face mating with that of the driven clutch-element, magnetically coacting stationary and .rotary motor-elements within said motor-frame', saidrotaryelement being lixed to the motor-shaft adjacent said liy-wheel, manually operated means for sliding said sleeve-shaft endwise, and a thrust bearing associated with the motrshaft bearing at the end of the motor-frame oiposite the end carrying the sleeve-shaft.

i 3. An electric power-transmitter comprising a hollow cylindrical frame having bearings at its opposite ends onl a rotary and endwise movable sleeve-sha journaled in one of said bearings, a driven clutch-element l carried by said sleeve-shaft within the motor-frame and formed with a friction clutch-face, a belt-pulley fixed to said sleeveshaft externally of the motor-frame, a inotor-shaft journaled at its opposite ends only in said sleeve-shaft and the other of the'motor-frame bearings, a driving clutch-element fixed to the motor-shaft within the motorrame and formed with a clutch-face mating with that of the driven clutch-element, magnetically coactin stationary and rotary motor-elements wit in said motor-frame, said rotary element bein iixed to the` motorshaft adjacent said ily-wheel, manually operatedA means' for sliding said sleeve-shaft -endwis e, -a thrust bearing associated with 'the motor-shaft bearing at-the end of the A motor-frame op osite the end carrying the sleeve-shaft, antila spring o eratively interposed between said sleeve `and motor-shafts.

4. An electric Wer-transmitter comprising a hollow cylindrical frame having bearin at .its opposite ends only, a rotary and sliaft adjacent said ily-wheel, manually operated means for sliding said sleeve-sha .endwse, a thrust bearing associated with att-he end' ofthe the motor-shaft bearing motor-frame op ite t e end carrying the sleeveshaft, an a stationary brake hoe mounted within the motor-frame for Ven'- gement by the driven clutch-element whenl t e latter is moved away from the driving clutch-element. f

In testimony whereof, Ihave signedmy name to this-specification.

PARK A.- HERR. i 

